The choice of the professional, the Supreme is geared towards the more spacious garden setting. The standard make-up including 5 blade louvre vents and 8ft shelving provides a high performance greenhouse to accommodate any enthusiast\'s needs. It also includes at least 2 roof and side vents, as standard, for optimum venitlation. Please call for a quote for installation or finials and crestings to be included in your greenhouse “ unfortunately packages are not available on the Elite Supreme. There is a variety of colour and glazing options. All Elite Greenhouse prices listed above include a base as standard which adds structural benefit and makes assembly simple! (excluding the 16ft long model)